Kayu manis / Manis jangan (Cinnamomum burmannii / Cinnamomum verum)

Cinnamaldehyde is the main bioactive compound—making up 60–90% of the essential oil—that provides the characteristic sweet-spicy aroma while also exhibiting anti-inflammatory and anti-diabetic properties. Procyanidins, a type of flavonoid polyphenol, function as powerful antioxidants that play an important role in cellular protection and help regulate blood sugar levels. Eugenol provides antiseptic effects and mild analgesic activity, while coumarin acts as a natural blood thinner, although its concentration can vary depending on the plant species.

Cinnamon plays an important role in blood sugar regulation by improving insulin sensitivity and stabilizing glucose levels, as demonstrated by various clinical studies. Its thermogenic properties help warm the body, improve circulation, and boost metabolism, making it useful for relieving cold hands and feet. In addition, its anti-inflammatory effects can help reduce joint pain and menstrual cramps. Cinnamon also exhibits broad-spectrum antimicrobial activity, inhibiting the growth of pathogenic bacteria and fungi, which is why it is often used as a natural preservative in various formulations.